#pragma once

#include<iostream>
#include<unordered_map>
#include<functional>

using task_t = std::function<void()>;
void DownLoad()
{
    std::cout<<"我是下载任务..."<<std::endl;
}
void Log()
{
    std::cout<<"我是日志任务..."<<std::endl;
}
void Sql()
{
    std::cout<<"我是数据库同步任务..."<<std::endl;
}
static int number = 0;
class TaskManger
{
public:
    TaskManger()
    {
        InsertTask(DownLoad);
        InsertTask(Log);
        InsertTask(Sql);

    }
    void InsertTask(task_t t)
    {
        tasks[number++] = t;
    }
    int SelectTack()
    {
        return rand() % number;
    }
    void Execute(int number)
    {
        if(tasks.find(number) == tasks.end())return;
        tasks[number]();
    }
    ~TaskManger()
    {}
private:
    std::unordered_map<int, task_t> tasks;
};

TaskManger tm;
void Worker()
{
    while (true)
    {
        int cmd = 0;
        int n = ::read(0, &cmd, sizeof(cmd));
        if (n == sizeof(cmd))
        {
            tm.Execute(cmd);
        }
        else if (n == 0)
        {
            std::cout << "pid: " << getpid() << " quit..." << std::endl;
            break;
        }
        else
        {
        }
    }
}